Improvement in window-sash fasteners



v C' R. w'EBB.

provement in Window-Sash Fasteners.

` NOl WM .WWW W UNITED STA'rEs PATENT OFFICE.

CHARLES R. WEBB, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN WINDOW-SASH FASTEERKS.

Speeification forming part of Letters Patent No. 130,396, dated August 13,1872.

Specification describing a certain Sash- Lock, invented by CHAs. R. WEBB, of Philadelphia, in the county of Philadelphia and State of Pennsylvania.

My invention relates to certain improvements in window-sash fasteners; and con: sists in a novel construction and arrangement of an upright stationary plate, a horizontal plate-latch, and a Vertical bolt for locking the sashes, as will be hereinafter more fully set forth and described.

Figure 1 illustrates the invention as applied. It shows, first, the upper sash witha stationary plate inserted,pwhich plate is seen in front elevation, Fig. 2, and in section, Fig. 3 second, the lower sash with a latch or button pivoted in a horizontal position to the top of it, which button is shown in plan Fig. 4.

The sashes are represented as closed but not locked.

The plate, Figs. 1, 2, and 3, which is let into the upper sash, consists of a flat part having screw-holes for the purpose of securing said plate to the inside face of the sash. The lower part of the plate is formed into a box or recess, and a place is cut in the sash to receive it. This box is fitted for the reception of the latch, Fig. 4, and is seen at the lower part of Figs. 2 and 3. The flat part of the plate projects downward, partly over the open front of the box, forming a depending lip, to provide a means of holding` the sashes together laterally. The section of the box and plate is shown in Fig. 3, made at the dotted line in Fig. 2. At the back of the plate is a bolt, which slides vertically, seen best in Fig. 3, the handle being seen also iu Figs. 1 and 2. Said bolt is to engage the latch when its end is in the box or recess, and prevent its beingpwithdrawn without lifting the bolt. The latch, Fig. 4-., seen also on top of the lower sash, Fig. 1, consists of a single casting fastened with one screw to the sash, the screw being also the pivot on which it turns. Said latch consists of a horizontal plate, the form of which is shown best' in Fig. 4. It has a screw-hole at its narrow end for pivoting it to the sash. Near the wide end of this latch there is a raised arc or flange, concentric with the screw-hole, and having a swelling at its center. Beyond this flange the end of the plate is formed into two inclines with a space between them. These inclines are, respectively, portions of a right-and-left helix, with the aforesaid screw-hole in the narrow end of the plate for their center, the left-hand incline, Fig. 4, being part of a left-hand helix, and the right-hand'incline being part of a right-hand helix. The latch has also a thumb-piece or projection upward from its face, by which to move it in the process of looking and unlocking the sashes.

Fig. 5 represents a modification of the plate, with its -depending lip, Figs. 2 and 3, which, for cheapness, may be made without either bolt or box, or with the bolt and without the box, as desired. By the insertion of an addit ional plate, Figs. 2 and 3, at any desirable point in the upper sash, the sashes may bc locked together, while open for ventilation, at the top or bottom, or both.

Operation.

(in this case the right-hand one) engages the bolt which it lifts as the latch moves into the box or recess. As thelatch comes to itsihome77 the swelling on the raised are engages the depending lip and draws the sashes firmly together; when home 77 the bolt falls into the space between the helical inclines and renders the withdrawal of the latch impossible without lifting the bolt. The lock may be made Janus faced or not, as desired.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, i-s- 1. The improved window-sash fastener, consisting of an upright stationary plate secured to the upper sash, and provided with a depending lip and a box-shaped recess, in combination with a horizontal plate-latch pivotedthe same, thereby securely loeking the sashes, all constructed, arranged, and cperating as heren shown and deseribed,f0r the purposes set forth.

CHAS. R. WEBB.

Wtnesses:

BURKITT WEBB, F. WEBB. 

